CN215845885U - Steering knuckle drilling clamp - Google Patents

Abstract

The utility model provides a steering knuckle drilling clamp which comprises a base, a first pressing assembly, a second pressing assembly and a third pressing assembly, wherein a positioning boss is arranged on the base and used for installing and positioning a left steering knuckle body and a right steering knuckle body; adopt this knuckle boring grab clamping left knuckle or right knuckle, not only be convenient for to the clamping of left knuckle or right knuckle to improve clamping efficiency, still improved work efficiency simultaneously, reduced wearing and tearing, compress tightly subassembly centre gripping left arm, third through the second and compress tightly subassembly centre gripping right arm and carry out assistance-localization real-time, still improved the steadiness to left knuckle or right knuckle centre gripping.

Description

Steering knuckle drilling clamp

Technical Field

The utility model belongs to the field of clamps, and particularly relates to a steering knuckle drilling clamp.

Background

The steering knuckle is one of important parts in an automobile steering axle, can enable an automobile to stably run and sensitively transmit the running direction, and transmits and bears variable loads at the front part of the automobile in the running process of the automobile, supports and drives a front wheel to rotate around a main pin, so that the automobile is steered. The knuckle is generally divided into a left knuckle and a right knuckle, the left knuckle including a left knuckle body and a left arm which are integrally manufactured, and the right knuckle including a right knuckle body and a right arm which are integrally manufactured.

When the steering knuckle (left steering knuckle and right steering knuckle) is machined, a general numerical control machine tool is usually adopted for machining, or a general milling machine, an upright drilling machine, a radial drilling machine and the like are adopted for machining, but universal fixture clamping is utilized in the clamping process, and the steering knuckle is of a special-shaped structure, so that the clamping steps are not standard, and the possibility of unstable clamping is likely to happen on the other hand.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a steering knuckle drilling jig suitable for quick clamping of a steering knuckle.

To achieve the above and other related objects, the present invention provides a drilling jig for a knuckle, the knuckle being divided into a left knuckle and a right knuckle, the left knuckle including a left knuckle body and a left arm, the right knuckle including a right knuckle body and a right arm, comprising:

the base is provided with a positioning boss;

the first pressing assembly is arranged on the base and is used for pressing the left steering knuckle body or the right steering knuckle body onto the positioning boss;

the second pressing assembly is arranged on the base and is used for assisting in positioning the left arm of the left steering knuckle;

and the third pressing assembly is arranged on the base and is used for assisting in positioning the right arm of the right steering knuckle.

Optionally, the positioning boss is a positioning ring, and the positioning ring is detachably arranged on the base. (ii) a

The base is provided with a first positioning structure used for positioning the positioning ring, and the positioning ring is provided with a second positioning structure used for positioning the left steering knuckle body or the right steering knuckle body.

Optionally, the positioning ring is provided with at least three supporting protrusions for supporting the left steering knuckle body or the right steering knuckle body, and the supporting protrusions are sequentially arranged around the axis of the positioning ring.

Optionally, the first compression assembly comprises:

the rotary pressing piece is used for pressing the left steering knuckle body or the right steering knuckle body onto the positioning boss, and when the rotary pressing piece presses the left steering knuckle body or the right steering knuckle body, the rotary pressing piece rotates to the position above the positioning boss;

the first connecting piece is arranged on the base and is hinged to one end of the rotating pressing piece;

the first locking piece is arranged on the base and connected to the other end of the rotating pressing piece;

the first connecting piece and the first locking piece are distributed on the periphery of the positioning boss, so that the rotary pressing piece spans over the positioning platform.

Optionally, the rotating pressing piece comprises a pressing block and a first mounting seat, two ends of the first mounting seat are respectively connected to the first connecting piece and the first locking piece, and the pressing block is arranged on the first mounting seat and used for pressing the left steering knuckle body or the right steering knuckle body.

Optionally, a first mounting groove is formed in the first mounting seat, a first boss is arranged on the pressing block, and the first boss is rotatably arranged in the first mounting groove.

Optionally, the pressing block is provided with at least one pressing boss for pressing the left steering knuckle body or the right steering knuckle body, and the pressing bosses are sequentially arranged on the pressing block.

Optionally, the second compression assembly comprises:

a second mounting seat arranged on the base, a second mounting groove for mounting the left arm is arranged on the second mounting seat,

and the second locking assembly is arranged on the second mounting seat and is used for pressing the left arm in the second mounting groove.

Optionally, the third compression assembly comprises:

the third mounting seat is arranged on the base, and a third mounting groove for mounting the right arm is formed in the third mounting seat;

and the third locking assembly is arranged on the third mounting seat and is used for pressing the right arm in the third mounting groove.

Optionally, the second mounting groove and the third mounting groove are both U-shaped grooves;

the second locking assembly comprises a first bolt and a second bolt, the first bolt is matched and penetrates through one side surface of the second mounting groove, the second bolt is matched and penetrates through the other side surface of the second mounting groove, and the first bolt I and the first bolt II are abutted against two sides of the left arm;

the third locking assembly comprises a third bolt and a fourth bolt, the third bolt is matched and penetrates through one side face of the third mounting groove, the fourth bolt is matched and penetrates through the other side face of the third mounting groove, and the third bolt and the fourth bolt are abutted against two sides of the right arm.

As described above, the knuckle drilling jig of the present invention has the following beneficial effects:

adopt this knuckle boring grab clamping left knuckle or right knuckle, not only be convenient for to the clamping of left knuckle or right knuckle to improve clamping efficiency, simultaneously, a plurality of different positions also can be processed to clamping, thereby reduced the clamping number of times, not only improved work efficiency, still reduced wearing and tearing, compress tightly subassembly centre gripping left arm, third through the second and compress tightly subassembly centre gripping right arm and carry out assistance-localization real-time, still improved the steadiness to left knuckle or right knuckle centre gripping.

Drawings

FIG. 1 is an isometric view of a left knuckle in an embodiment of the present invention;

FIG. 2 is an isometric view of a right knuckle according to an embodiment of the present invention;

FIG. 3 is an elevation view of a knuckle drill clamp according to an embodiment of the utility model;

FIG. 4 is a left side view of a knuckle drill jig according to an embodiment of the utility model;

FIG. 5 is an isometric view of a knuckle drill jig according to an embodiment of the utility model;

FIG. 6 is an exploded view of a base according to an embodiment of the present invention;

FIG. 7 is an isometric view of a rotating hold down member according to an embodiment of the present invention;

FIG. 8 is a cut-away view of a rotating hold down of an embodiment of the present invention;

FIG. 9 is an exploded view of a rotating hold down member in accordance with an embodiment of the present invention;

FIG. 10 is an isometric view of a knuckle drill jig clamping a left knuckle according to an embodiment of the present invention;

FIG. 11 is an isometric view of a knuckle drill jig clamping a right knuckle according to an embodiment of the utility model.

Part number description:

11-left knuckle; 111-left knuckle body; 112-left arm; 12-right knuckle; 121-right knuckle body; 122-right arm; 13-processing the dough;

2-a base; 2 a-avoiding hole; 2 b-a positioning ring mounting groove; 21-positioning a boss; 21 a-support protrusions; 22-a first locator pin; 23-a second locating pin;

3-a first hold-down assembly; 31-rotating the pressing member; 311-a compression block; 311 a-a first boss; 311 b-compression boss; 312 — a first mount; 312 a-a first mounting slot; 32-a first connector; 33-a first locking member; 331-threaded rod; 332-a locking nut; 34-a first pin; 35-a second pin;

4-a second hold-down assembly; 41-a second mount; 41 a-a second mounting groove; 42-a second locking assembly; 421-a first bolt; 422-second bolt;

5-a third hold-down assembly; 51-a second mount; 51 a-a second mounting groove; 52-a second locking assembly; 521-a third bolt; 522-fourth bolt.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

As shown in fig. 1-2, the knuckle is generally divided into a left knuckle 11 and a right knuckle 12, the left knuckle 11 includes a left knuckle body 111 and a left arm 112, and the left knuckle body 111 and the left arm 112 are integrally formed; the right knuckle 12 includes a right knuckle body 121 and a right arm 122, the right knuckle body 121 and the right arm 122 being integrally formed; the left knuckle body 111, the left arm 112, the right knuckle body 121 and the right arm 122 all have machined surfaces 13 to be drilled.

As shown in fig. 3 to 11, the utility model provides a steering knuckle drilling fixture, which comprises a base 2, a first pressing component 3, a second pressing component 4 and a third pressing component 5, wherein the first pressing component 3, the second pressing component 4 and the third pressing component 5 are all mounted on the base 2, the base 2 is further provided with a positioning boss 21 for mounting and positioning a left steering knuckle body 111 or a right steering knuckle body 121, the positioning boss 21 is detachably mounted on the base 2, and the positioning boss 21 is detachably fixed and assembled because the positioning boss 21 is frequently worn, so that the positioning boss 21 can be conveniently replaced, the service life of the base 2 is prolonged, the cost is reduced, and of course, the positioning boss 21 can be integrally formed with the base 2 and can be selected according to specific requirements. Still offer the hole of dodging 2a that is used for dodging pole portion of left knuckle body 111 or the pole portion of right knuckle body 121 on this base 2, should dodge hole 2a and be the through-hole structure, the processing of the hole of should dodging 2a of being convenient for, of course, still can select according to specific demand for counter bore structure.

As shown in fig. 1 and 10, correspondingly, when the left knuckle 11 is clamped, the left knuckle body 111 is first mounted on the positioning boss 21 of the base and is positioned by the positioning boss 21, so that the left knuckle body 111 cannot slide relative to the base 2; at this time, the rod portion of the left knuckle body 111 is located in the avoidance hole 2 a; after the left steering knuckle body 111 is installed on the positioning boss 21, the left steering knuckle body 111 is pressed on the positioning boss 21 through the first pressing component 3, so that the left steering knuckle body 111 and the base 2 are fixed into a whole, and the left arm 112 is clamped and fixed through the second pressing component 4, so that the auxiliary positioning effect on the left arm 112 is achieved, and the clamping stability of the left steering knuckle 11 is improved.

As shown in fig. 2 and 11, when the right knuckle 12 is clamped, the right knuckle body 121 is first mounted on the positioning boss 21 of the base, and the positioning boss 21 is positioned so that the right knuckle body 121 cannot slide relative to the base 2; at this time, the rod portion of the right knuckle body 121 is located in the avoiding hole 2 a; after right knuckle body 121 is installed on location boss 21, compress tightly right knuckle body 121 on location boss 21 through first compress tightly subassembly 3 for this right knuckle body 121 and base 2 are fixed as an organic whole, and the rethread third compresses tightly subassembly 5 and presss from both sides the tight fixed with right arm 122, not only plays the assistance-localization real-time effect to right arm 122, still improves the steadiness to the centre gripping of right knuckle 12.

Adopt this knuckle boring grab clamping left knuckle 11 or right knuckle 12, not only be convenient for to the clamping of left knuckle 11 or right knuckle 12 to improve clamping efficiency, simultaneously, a plurality of different positions also can be processed to clamping, thereby the clamping number of times has been reduced, not only work efficiency has been improved, still wearing and tearing have been reduced, compress tightly 4 centre gripping left arms 112 of subassembly through the second, the third compresses tightly 5 centre gripping right arms 122 of subassembly and carry out assistance-localization real-time, still improved the steadiness to the centre gripping of left knuckle 11 or right knuckle 12.

In some embodiments, as shown in fig. 3 to 6, the positioning boss 21 is a positioning ring, the base 2 is provided with a positioning ring installation groove 2b, the positioning ring installation groove 2b is coaxially arranged with and communicated with the avoidance hole 2a, and the positioning ring is detachably and fixedly installed in the positioning ring installation groove 2b, that is, the positioning ring can be fixedly installed in the positioning ring installation groove 2b by a bolt connection, a snap connection or other forms of detachable connection, in this case, the positioning ring is fixedly installed in the positioning ring installation groove 2b by a bolt, which can improve the assembly efficiency; the positioning ring is installed by arranging the positioning ring installation groove 2b, so that the structural compactness is improved.

Meanwhile, the positioning ring mounting groove 2b is also internally provided with a first positioning structure for mounting and positioning the positioning ring, the positioning ring can be conveniently assembled and prevented from rotating (sliding) in the positioning ring mounting groove 2b by the arrangement of the positioning structure, the first positioning structure can be a positioning pin or a limiting boss structure, in the embodiment, the first positioning structure is a first positioning pin 22, the first positioning pin 22 is adopted, the structure is simple, the production and the manufacture are convenient, the number of the first positioning pins 22 is at least two, specifically, the number of the first positioning pins 22 is three, the first positioning pins 22 are uniformly distributed on the bottom surface of the positioning ring mounting groove 2b around the axis of the positioning ring mounting groove 2b, the lower end surface of the positioning ring is provided with first pin holes matched with the first positioning pins 22, when the positioning ring is mounted, the first positioning pins 22 are respectively inserted into the first pin holes, make this position circle can not be at position circle mounting groove 2b internal rotation, not only have the effect of installation location, still have the effect to the position circle direction.

Correspondingly, the positioning ring is provided with a second positioning structure for mounting and positioning the left knuckle body 111 or the right knuckle body 121, the second positioning structure can be a positioning pin or a limiting boss structure, in this example, the second positioning structure is a second positioning pin 23, at least two second positioning pins 23 are provided, specifically, two second positioning pins 23 are provided and fixedly mounted on the upper end surface of the positioning ring, the second positioning pins are uniformly distributed around the axis of the positioning ring, the lower end surface of the left knuckle body 111 or the right knuckle body 121 is provided with second pin holes matched with the second positioning pins 23, when the left knuckle body 111 or the right knuckle body 121 is mounted, the second positioning pins 23 are respectively inserted into the second pin holes, and the upper end surface of the positioning ring supports the left knuckle body 111 or the right knuckle body 121, so that the left knuckle body 111 or the right knuckle body 121 is stably mounted, and the positioning ring can not rotate, so that the installation and positioning functions are realized.

In some embodiments, as shown in fig. 3 to 6, a supporting protrusion 21a for supporting the left knuckle body 111 or the right knuckle body 121 is installed on the positioning ring, and by providing the supporting protrusion 21a, when the positioning ring is processed, only the upper end surface of the supporting protrusion 21a needs to be finished, and the upper end surface of the entire positioning ring does not need to be finished, so that the processing amount is reduced, because the area of the upper end surface of the positioning ring is larger than that of the upper end surface of the supporting protrusion 21a, the flatness of the positioning ring is more difficult to ensure during processing, and by providing the supporting protrusion 21a, the processing difficulty is also reduced; in addition, the supporting protrusion 21a can be integrally formed with the positioning ring or fixedly mounted on the positioning ring in a detachable manner, in this example, the supporting protrusion 21a and the positioning ring are integrally formed, which not only reduces the assembly process, but also enhances the structural strength of the connection part of the supporting protrusion 21a and the positioning ring body; the number of the supporting protrusions 21a is at least three, and specifically, the supporting protrusions 21a are three, and are sequentially arranged on the upper end surface of the positioning ring around the axis of the positioning ring, and the second positioning pins are staggered.

Accordingly, when the left or right knuckle body 111 or 121 is mounted, the left or right knuckle body 111 or 121 is mounted on the support protrusion 21a of the cage, supported by the support protrusion 21a, and positioned by the second positioning pin 23 on the cage.

In some embodiments, as shown in fig. 7 to 9, the first pressing assembly 3 includes a rotating pressing member 31, a first connecting member 32 and a first locking member 33, the first connecting member 32 and the first locking member 33 are distributed on the periphery of the positioning boss 21 and are fixedly mounted on the base 2, one end (left end in fig. 3) of the rotating pressing member 31 is hinged on the first connecting member 32, that is, the rotating pressing member 31 and the first connecting member 32 are connected by a first pin 34, and the first pin 34 is arranged along the direction K in the drawing, so that the rotating pressing member 31 can rotate relative to the first connecting member 32 around the first pin 34;

correspondingly, the other end (the right end in fig. 3) of the rotating pressing member 31 is locked and fixed by the first locking member 33, the first locking member 33 includes a threaded rod 331 and a locking nut 332, the other end of the rotating pressing member 31 is provided with a U-shaped groove, the U-shaped groove axially penetrates through the rotating pressing member 31 along the positioning boss, the threaded rod 331 is fixedly installed on the base 2 and passes through the U-shaped groove of the rotating pressing member 31, and the locking nut 332 is engaged with the thread on the threaded rod 331 and abuts against the rotating pressing member 31.

Specifically, when the left knuckle body 111 or the right knuckle body 121 is installed, the left knuckle body 111 or the right knuckle body 121 is installed on the positioning boss 21 of the base, the rotating pressing member 31 rotates around the first pin shaft 34, so that the rotating pressing member 31 spans over the left knuckle body 111 or the right knuckle body 121, the threaded rod 331 is arranged in the U-shaped groove of the rotating pressing member 31 in a penetrating manner, and is in threaded fit with the threaded rod 331 through the lock nut 332 and abutted against the rotating pressing member 31, so that the rotating pressing member 31 presses the left knuckle body 111 or the right knuckle body 121 onto the base 2.

In some embodiments, as shown in fig. 7 to 9, the rotating pressing member 31 includes a pressing block 311 and a first mounting seat 312, two ends of the first mounting seat 312 are respectively connected to the first connecting member 32 and the first locking member 33, the pressing block 311 is detachably mounted on the first mounting seat 312, or is integrally formed with the first mounting seat, in this case, the pressing block 311 is detachably mounted on the lower side (on the base side) of the first mounting seat 312 and is used for pressing the left knuckle body 111 or the right knuckle body 121, and by detachably connecting the pressing block 311 and the first mounting seat 312, the difficulty in processing can be reduced, and thus the processing quality can be improved.

In some embodiments, as shown in fig. 7 to 9, the pressing block 311 is rotatably connected to the first mounting seat 312, or fixedly connected to the first mounting seat 312, in this example, the pressing block 311 is rotatably mounted on the first mounting seat 312, a first mounting groove 312a is defined on a lower side of the first mounting seat 312, a first boss 311a is defined on an upper side of the pressing block 311, the first boss 311a is disposed in the first mounting groove 312a, and penetrates the first mounting groove 312a and the first boss 311a along a direction K in the drawing through the second pin 35, so that the first boss 311a and the first mounting groove 312a form a hinged connection, the first boss 311a can rotate in the first mounting groove 312a around the second pin 35, and with this structure, when the left knuckle body 111 or the right knuckle body 121 is clamped, when the locking nut 332 is locked, the pressing block 311 rotates relative to the first mounting seat 312, the self-adaptation its compresses tightly the state, can not only increase the steadiness of clamping, can also improve the durability.

In some embodiments, as shown in fig. 9, the lower side of the pressing block 311 is provided with at least one pressing boss 311b for pressing the left or right knuckle body, in this example, two pressing bosses 311b are respectively provided at two ends of the lower side of the pressing block 311, and with this structure, not only the pressing stability can be improved, but also the processing amount can be reduced.

In some embodiments, as shown in fig. 3 to 6, the second pressing assembly 4 includes a second mounting seat 41 and a second locking assembly 42, the second mounting seat 41 is fixedly mounted on the base 2, the second locking assembly 42 is mounted on the second mounting seat 41, a second mounting groove 41a for mounting the left arm is formed in the second mounting seat 41, and when the left steering knuckle 11 is mounted, the left arm 112 is mounted in the second mounting groove 41a, and the left arm 112 is clamped and fixed by the second locking assembly 42, so as to perform an auxiliary positioning function on the left arm.

In some embodiments, as shown in fig. 3 to 6, the third pressing assembly 5 includes a third mounting seat 51 and a third locking assembly 52, the third mounting seat 51 is fixedly mounted on the base 2, the third locking assembly 52 is mounted on the third mounting seat 51, a third mounting groove 51a for mounting the right arm is formed in the third mounting seat 51, and when the right knuckle 12 is mounted, the right arm 122 is mounted in the third mounting groove 51a, and the right arm 122 is clamped and fixed by the third locking assembly 52, so as to perform an auxiliary positioning function on the right arm.

In some embodiments, as shown in fig. 3-6 and fig. 10-11, the second mounting groove 41a and the third mounting groove 51a are both U-shaped grooves, the second mounting groove 41a extends through the second mounting seat along the direction L in the drawing, and the third mounting groove 51a extends through the third mounting seat along the direction L in the drawing;

the second locking assembly 42 includes a first bolt 421 and a second bolt 422, a first threaded hole and a second threaded hole for installing the first bolt 421 and the second bolt 422 are respectively opened on two side surfaces of the second installation groove 41a, the first threaded hole and the second threaded hole respectively penetrate through two side surfaces of the second installation groove 41a, the first bolt 421 and the second bolt 422 are respectively installed in the first threaded hole and the second threaded hole, when the left steering knuckle 11 is installed, the first bolt 421 and the second bolt 422 are tightly pressed against the left arm 112, and the effect of clamping and positioning the left arm is achieved.

The third locking assembly 52 includes a third bolt 521 and a fourth bolt 522, a third threaded hole and a fourth threaded hole for installing the third bolt 521 and the fourth bolt 522 are respectively opened on two side surfaces of the third mounting groove 51a, the third threaded hole and the fourth threaded hole respectively penetrate through two side surfaces of the third mounting groove 51a, the third bolt 521 and the fourth bolt 522 are respectively installed in the third threaded hole and the fourth threaded hole, when the right knuckle 12 is installed, the third bolt 521 and the fourth bolt 522 are tightly pressed against the right arm, and the right arm is clamped and positioned.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a knuckle boring grab, the knuckle is left knuckle and right knuckle, left knuckle includes left knuckle body and left arm, right knuckle includes right knuckle body and right arm, its characterized in that includes:

the base is provided with a positioning boss;

the first pressing assembly is arranged on the base and is used for pressing the left steering knuckle body or the right steering knuckle body onto the positioning boss;

the second pressing assembly is arranged on the base and is used for assisting in positioning the left arm of the left steering knuckle;

and the third pressing assembly is arranged on the base and is used for assisting in positioning the right arm of the right steering knuckle.

2. The knuckle drilling jig of claim 1, wherein: the positioning boss is a positioning ring which is detachably arranged on the base;

the base is provided with a first positioning structure used for positioning the positioning ring, and the positioning ring is provided with a second positioning structure used for positioning the left steering knuckle body or the right steering knuckle body.

3. The knuckle drilling jig of claim 2, wherein: the positioning ring is provided with at least three supporting bulges which are used for supporting the left steering knuckle body or the right steering knuckle body and are sequentially arranged around the axis of the positioning ring.

4. The knuckle drilling clamp of claim 1, wherein the first compression assembly comprises:

the rotary pressing piece is used for pressing the left steering knuckle body or the right steering knuckle body onto the positioning boss, and when the rotary pressing piece presses the left steering knuckle body or the right steering knuckle body, the rotary pressing piece rotates to the position above the positioning boss;

the first connecting piece is arranged on the base and is hinged to one end of the rotating pressing piece;

the first locking piece is arranged on the base and connected to the other end of the rotating pressing piece;

the first connecting piece and the first locking piece are distributed on the periphery of the positioning boss, so that the rotary pressing piece spans over the positioning platform.

5. The knuckle drilling jig of claim 4, wherein: the rotary compression piece comprises a compression block and a first mounting seat, two ends of the first mounting seat are connected to the first connecting piece and the first locking piece respectively, and the compression block is arranged on the first mounting seat and used for compressing the left steering knuckle body or the right steering knuckle body.

6. The knuckle drilling jig of claim 5, wherein: the clamping block is provided with a first mounting groove, the pressing block is provided with a first boss, and the first boss is rotatably arranged in the first mounting groove.

7. The knuckle drilling jig of claim 6, wherein: the pressing block is provided with at least one pressing boss used for pressing the left steering knuckle body or the right steering knuckle body, and the pressing bosses are sequentially arranged on the pressing block.

8. The knuckle drilling clamp of claim 1, wherein the second compression assembly comprises:

a second mounting seat arranged on the base, a second mounting groove for mounting the left arm is arranged on the second mounting seat,

and the second locking assembly is arranged on the second mounting seat and is used for pressing the left arm in the second mounting groove.

9. The knuckle drilling clamp of claim 8, wherein the third compression assembly comprises:

the third mounting seat is arranged on the base, and a third mounting groove for mounting the right arm is formed in the third mounting seat;

and the third locking assembly is arranged on the third mounting seat and is used for pressing the right arm in the third mounting groove.

10. The knuckle drilling jig of claim 9, wherein: the second mounting groove and the third mounting groove are both U-shaped grooves;

the second locking assembly comprises a first bolt and a second bolt, the first bolt is matched and penetrates through one side surface of the second mounting groove, the second bolt is matched and penetrates through the other side surface of the second mounting groove, and the first bolt I and the first bolt II are abutted against two sides of the left arm;

the third locking assembly comprises a third bolt and a fourth bolt, the third bolt is matched and penetrates through one side face of the third mounting groove, the fourth bolt is matched and penetrates through the other side face of the third mounting groove, and the third bolt and the fourth bolt are abutted against two sides of the right arm.

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